Mention the words metal detector and you'll get completely different reactions from different people. For instance, some people think of combing a beach in search of coins or buried treasure. Other people think of airport security, or the handheld scanners at a concert or sporting event.
Metal-detector technology is a huge part of our lives, with a range of uses that spans from leisure to work to safety. The metal detectors in airports, office buildings, schools, government agencies and prisons help ensure that no one is bringing a weapon onto the premises.

Door Frame Metal Detector:

Door Frame Metal Detector creates high frequency electromagnetic field through which all persons should pass. Presence of any metallic particles causes a reaction in this field, which is sensed by the detector and the signal is amplified and processed as required. 
Security is absolute with this metal detector. Door Frame Metal Detector, is designed to detect both Ferrous and Non Ferrous Metals, which is passed through aperture vicinity in any conceivable manner. 
This Metal Detector is highly sensitive and are been used in the jewelry manufacturing units and other various manufacturing units to protect the various unavoidable pilfering activities. This Metal Detector is ideal for customs, factories and all high security areas. This Metal Detector has a Phase sensitive detection circuits which allows the user to enhance the sensitivity for certain group of metals and reduces it for others to a large extent.

Salient Features 
Maximum target discrimination. 
Lower power consumption. 
Instant recovery on detection. 
Easy to operate, no specially skilled personnel is required to operate. 
High reliability, long life performance. 
High sensitivity and high accuracy. 
Detects all metals including the magnetic stainless steel. 
Totally indigenous, spare parts and maintenance readily available. 
Robust and user friendly controls and features. 
Audio/Visual alarm on detection. 

Hand Held Metal Detectors: